Daylight Savings Time: Surviving Decreased Mileage

I don't know how to do this. I do not know how to maintain my weekly mileage when it becomes dark the minute I arrive home from work. I miss the long after work runs, the release from stress that running outside brings. I do manage to hit the treadmill at 4:30 am, but for a short two mile run. I sweat for a few minutes, then race off to work. How do we make it through the winter, maintain fitness and sanity. Advice? I miss this stretch of road....